- Maintenance standardize datetime format to YYYY-MM-DD hh:mm:ss

- Import dayjs extensions one time only
- Maintenance activeCondition centralize

server/model/heartbeat.js

@@ -1,8 +1,4 @@
 const dayjs = require("dayjs");
-const utc = require("dayjs/plugin/utc");
-let timezone = require("dayjs/plugin/timezone");
-dayjs.extend(utc);
-dayjs.extend(timezone);
 const { BeanModel } = require("redbean-node/dist/bean-model");
 
 /**